linux-kernel - [PATCH] drivers/target: Use RCU_INIT_POINTER(x, NULL) in tcm_fc/tfc

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Date:	Mon, 24 Mar 2014 00:09:49 +0530
From:	Monam Agarwal <monamagarwal123@...il.com>
To:	nab@...ux-iscsi.org, nab@...erainc.com,
	yongjun_wei@...ndmicro.com.cn, linux-scsi@...r.kernel.org,
	target-devel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] drivers/target: Use RCU_INIT_POINTER(x, NULL) in tcm_fc/tfc_sess.c

This patch replaces rcu_assign_pointer(x, NULL) with RCU_INIT_POINTER(x, NULL)

The rcu_assign_pointer() ensures that the initialization of a structure       
is carried out before storing a pointer to that structure. 
And in the case of the NULL pointer, there is no structure to initialize. 
So, rcu_assign_pointer(p, NULL) can be safely converted to RCU_INIT_POINTER(p, NULL)

Signed-off-by: Monam Agarwal <monamagarwal123@...il.com>
---
 drivers/target/tcm_fc/tfc_sess.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/target/tcm_fc/tfc_sess.c b/drivers/target/tcm_fc/tfc_sess.c
index ae52c08..ca7b1ed 100644
--- a/drivers/target/tcm_fc/tfc_sess.c
+++ b/drivers/target/tcm_fc/tfc_sess.c
@@ -97,7 +97,7 @@ static void ft_tport_delete(struct ft_tport *tport)
 	ft_sess_delete_all(tport);
 	lport = tport->lport;
 	BUG_ON(tport != lport->prov[FC_TYPE_FCP]);
-	rcu_assign_pointer(lport->prov[FC_TYPE_FCP], NULL);
+	RCU_INIT_POINTER(lport->prov[FC_TYPE_FCP], NULL);
 
 	tpg = tport->tpg;
 	if (tpg) {
-- 
1.7.9.5

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